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Sagot :
To find the values of [tex]\(a\)[/tex] and [tex]\(b\)[/tex], we start by using the given equation of the line:
[tex]\[ y = 2x - 3 \][/tex]
### Step 1: Finding [tex]\(a\)[/tex]
We know the ordered pair [tex]\((a, -1)\)[/tex] belongs to the line. Hence, substituting [tex]\(y = -1\)[/tex] and [tex]\(x = a\)[/tex] into the equation:
[tex]\[ -1 = 2a - 3 \][/tex]
To solve for [tex]\(a\)[/tex], we first add 3 to both sides of the equation:
[tex]\[ -1 + 3 = 2a \][/tex]
Which simplifies to:
[tex]\[ 2 = 2a \][/tex]
Next, we divide both sides by 2:
[tex]\[ a = 1 \][/tex]
Thus, the value of [tex]\(a\)[/tex] is:
[tex]\[ a = 1 \][/tex]
### Step 2: Finding [tex]\(b\)[/tex]
We know the ordered pair [tex]\((5, b)\)[/tex] belongs to the line. Hence, substituting [tex]\(x = 5\)[/tex] into the equation and solving for [tex]\(y = b\)[/tex]:
[tex]\[ b = 2(5) - 3 \][/tex]
This simplifies to:
[tex]\[ b = 10 - 3 \][/tex]
Which further simplifies to:
[tex]\[ b = 7 \][/tex]
Thus, the value of [tex]\(b\)[/tex] is:
[tex]\[ b = 7 \][/tex]
### Summary
The values of [tex]\(a\)[/tex] and [tex]\(b\)[/tex] are:
[tex]\[ a = 1 \quad \text{and} \quad b = 7 \][/tex]
[tex]\[ y = 2x - 3 \][/tex]
### Step 1: Finding [tex]\(a\)[/tex]
We know the ordered pair [tex]\((a, -1)\)[/tex] belongs to the line. Hence, substituting [tex]\(y = -1\)[/tex] and [tex]\(x = a\)[/tex] into the equation:
[tex]\[ -1 = 2a - 3 \][/tex]
To solve for [tex]\(a\)[/tex], we first add 3 to both sides of the equation:
[tex]\[ -1 + 3 = 2a \][/tex]
Which simplifies to:
[tex]\[ 2 = 2a \][/tex]
Next, we divide both sides by 2:
[tex]\[ a = 1 \][/tex]
Thus, the value of [tex]\(a\)[/tex] is:
[tex]\[ a = 1 \][/tex]
### Step 2: Finding [tex]\(b\)[/tex]
We know the ordered pair [tex]\((5, b)\)[/tex] belongs to the line. Hence, substituting [tex]\(x = 5\)[/tex] into the equation and solving for [tex]\(y = b\)[/tex]:
[tex]\[ b = 2(5) - 3 \][/tex]
This simplifies to:
[tex]\[ b = 10 - 3 \][/tex]
Which further simplifies to:
[tex]\[ b = 7 \][/tex]
Thus, the value of [tex]\(b\)[/tex] is:
[tex]\[ b = 7 \][/tex]
### Summary
The values of [tex]\(a\)[/tex] and [tex]\(b\)[/tex] are:
[tex]\[ a = 1 \quad \text{and} \quad b = 7 \][/tex]
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